Abstract: Facing the deteriorating environment and the depletion of oil resources,as a typical application of the clean energy,the use of CNG cylinders increase year by year,and CNG vehicles are used more widely gradually in the country. CNG-2 cylinders are made up of the metal liner and the outer layer of high strength fiber reinforced composite material composition. They have been widely used because of their light weight,high strength and safety and reliability. In the process of using,it appears some failures and explosion,which results in more and more attention to the safety analysis and research into cylinders. This paper takes CNG-2 cylinders as the research object, describes the optimization process of the auto-frottage pressure using ANSYS.

Key words: CNG-2 cylinders, auto-frottage pressure, optimization